Operating system: Windows-7-6.1.7601-SP1 64 Bits
Graphics card: GeForce GTX 1060 6GB/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 419.35
Broken: version: 2.80 (sub 64), branch: blender2.7, commit date: 2019-05-14 00:25, hash: rBa5b5bd2c24e0
Short description of error
[Please fill out a short description of the error here]
With newest version you can scrub the timeline with left mouse button at the top. But sometimes the mouse cursor jumps to the bottom now.
Exact steps for others to reproduce the error
[Please describe the exact steps needed to reproduce the issue]
[Based on the default startup or an attached .blend file (as simple as possible)]
Insert keyframe. Scrub the timeline at the top with the left mouse button. See the cursor jumping from top to bottom and back.